You may want to consider putting high temp fluid in it and get some better pads. SS lines are a good idea too. The brakes heat up pretty easy on the Z, boiling them is no fun. While your at it put the high temp fluid in your clutch and wrap the line with insulation. It runs next to the cat. and has a tendency to boil too, ...oil cooler is the other necessary track aid to consider.
Your probably OK the first event, it's when you get use to your Z and start turning it up that the heating problems arise.